Concrete-mixer.



No. 853,945. PATBNTED MAY 21,1907.

-G. L. BALDWIN.

CONCRETE MIXER. APPLIOATION FILED mums, 1906.

8 SHEETSSHEET 1.

\ I l I I I I N o I 8 5 3 y 9 4 5 I I I CON PPPPPP AT :1 llllllllllll If1/ i. l- A 033 TTTTTTT IIIIIIIIIIIIIIIIII 6.

A IIIIIIIIIIIIIIIllIllllllllllllllllllllllllllillm V l/ PATENTED MAY 211907.

G. L. BALDWIN. CONCRETE MIXER.

APPLICATION FILED JAN. 15, 1906.

3 SHEETS-SHEET 3.

' I I (Juucnloz Charles .Zhfialdwin, I

EED erases earn 1 CHARLES L Bau eases.

or. WATERLOO, iowA.

eoucaEre=ruaxzn.

Specification ot Letters Patent. Application filed January 15,1566.Seria1Nd296p34.

Patented May 21, 1907.

To all whom it may concern.-

Be it known that I, CHARLES L. BALDWIN,

a citizen-of the United States of America, and

a resident of Waterloo, Blackhawk county,

same, Fig. 3.. is a vertical axial-section of the rior, Fig. 4 is also avertical axial section of mixing-drum, showing one side of the inte-.

the said mixing-drum, showing the other side of the interionwhile Fig. 5andv Fig. 6 are side elevations of mixing-drums having other s ecificand varied forms. 4

Similhr numbers refer to similar parts throughout the several views. I

My improved mixing-drum has its receiving spout 8 and delivery spout 7respectively furnished with journals set between the 1 flanges {Landthese journals are supported. and revolve within the bearings 1.0, 11,at-

so u o a u 1n -.drum concentric with its axis: I

tached to a tilting hanging frame 27 en ported by hangers 14 and15 fromthe stuhshaftslfi and 17, respectively. The :hanger 14 is fixedlyconnected to the stuli shaft- 16, while the hanger 15 is rotatablymounted on the stub-shaft 17. The stub-shaft- 16 is rotatably mounted inthe bearing 2Q on the top of the end post 22, which latter is aflixed toone end of a truck-platform 38 mounted on wheels 39. The stub-shaft 17is rotatably mounted on a bearing 21 on the to of the end post 23 set onthe other end of the truck 38. A belt-wheel 18 is mounted upon the.outer end of the stub-shaft 17, said shaft carrying on its innerend apinion 43*whose teeth are arranged to intermesh with those of agear-wheel exteriorly mounted on the 'ring' l-aifixed'about the exteriorof-the mixom an inspection of Fig. 2 it will be see that the hangers. 14and 15 are attached" to the hanging or tilting frame 27 nearer the re-"ceiving nd than the delivery end of the.

mixiiig drum, or in other wordsoutside of.

. the-center of gravity, so thatwhen the ports 28 and 29 arewithdrawm'the delivery end of the tilting frame will drop and permit thecontents of the mixing drum to pass out throughthefspout 7-. Thedelivery end of the ting frame/is supported on the tops of the outerends of theinwardly bent members 28 and 29 of the levers 31 and 30respectively. I

The lever 31 is medially pivoted-on the'stub bolt 33 set-in a-bracket 34extending from the end post 23. The lever30is medially .pivoted on astub 32 fixed in a cross-bar 44 attached to the end post 22. Thehanddever- 37 is pivoted on the stud extending from the side of the endpost23, the short end of "said lever being connected by means of a link36- with the lower end of the lever 30. A spring 35 is connected betweenthe lever 31 and the post 23. The free end of the lever 31 is alsoconnected to. the upper portion of the lever. 37 by means of 'a' link55. The upward movement of the delivery end of the ban g frame27,beyond, the normal is prevente by means of I stop 24 affixed to-thepost 22.,

A fixed receiving spout 41 is supported by a curved bracket 42 attachedto the hanging; frame 27. The inner end of said spout enters andcommunicates with the interior of the 'drum'through the receiving-cone8..

drum to. be intheform of a short cylinder capped. at either end :bytruncated cones, having an octagonal plan. The form of-m ix' .3 Ihavedepicted in Figs. 2, 5, and 6 differnt specific'forms ofmixing-drums theaxis;- of each being set at an angle of about 45-de rees to the axis ofrotation ofsa'id'drum; Fig. 2 shows the-main portion of themixinging-drum' shown in F g; 5"'is that of, a; cylinder 4 having itsheight equal to its diameter. The form of the drum'shown in Fig. 6 isthat -or'a like cylinder having its up er and lower 0 positely set edgestruncated.

transverse bars numbered from 47 to 54, elusive. These shears are setonly on the V he shears 49 and 50 are placed parallei with the. formalaxis of the drain. The other shears are .pllacil at anglgis convergentto or divei-gent om each ot as shown in Figs. 3 and-4. In case.mixing'dwms of the forms shown in Figs. 5 and 6 are used, the shears47to 54, m elusive, are -placed along the ihner periph- Afiixed to t e.interior periphery'of the mixing-drrun shown in Figs. 3 and .4, areinwardlyextendinginner periphry of the cylindrical plate 4, the heads 2and 6 and the oblique lates 3 and 5 being clean-of obstruction. r05.

cries of said drums attached to the cylini reason of the ec-uliar shapeof the drum, collected and t on thrown across the drum twice during eachrevolution. The shears 47 to.54, inclusive, by means of their constantchange of position relative to the axis of rotation of the drum,constantly catch up and agitate the materials therein causing them to.

be thrown in every conceivable direction, causing 1n the briefest timean ade uate amalgamation. As usual in this class machinery, the unmixedmaterialsare introdueed through the receiving spout 41' into the'ifnixing-drum, whence, after, admixture, 'commingled mass is evacuatedfrom the mixing 'drum in the following manner. The upper part ofathehand-lever 37 being moved outward, the levers 30 and 31 linked theretohavev their upper members 29, and 28,respectively, withdrawn frombeneath the hanging frameg27, permitting the .mixing-' drum-to tiltsufficiently to permit its con- I tents' t o flow outthrough the spout7. When em tied the mixing-drum may be brouglrt bac to its formerposition by means of the hand-lever 19.

Having describedmy invention, what I claim asnew and desire to secure byLetters Patent, is A, r

1. he concrete mlxer, the combination of arevolu'ble mixingdrum-comprising a hollow cylinder with closed truncated coni'cal ends,the axis ofsaid drum being inclined. to the axis of rotation, an inlets'pout and an outlet spout connected to oppositeends of said drum in theaxis of rotation, a tilting frame,

and bearings on said tilting frame'for rota tably supportingsaid spouts.

2. In a concrete mixery the combination of a revoluble mixing drum,comprising a: hollow cylinder having closed truncatedconical' ends theaxis of said drumbeing inclined to the axis'of rotation, an inlet spoutand an outlet spout connected ,toi opposite ends of i 'said drum theaxis of rotation, a tilting frame, bearings thereon 'for said drum, and

trunnions on the tilting frame outside' the center of gravity of saidframe and mixing drum."

. 3-. .In a concrete mixer, the combination of revoluble mixing drum,comprising a hot l'ow cylinder having olosedtruncated conical ends,the'axis of said drum being inclined to of Dec, 1905.

the axis of rotation, an inlet spout and an outlet spout connected toopposite ends-of said drum in the axis of rotation, a tilting framerotatabl sup )orting said drum, trunnions 9n the ti ting lrame outsidethe center of gravity of said tilting frame and mixing drum, means forholding the tilting frame in operative position, and means for rotatingsaid drum.

4. In a concrete mixer, the combination of a revoluble mixing drum,comprising a ical ends the axis of said drum being inclined to the axisof rotation, an inlet spout, and an outlet spout connected to said drum,the said s outs being in the axis of rotation.

5. n a concrete mixer, the combination of a revolublc mixing drumcomprising a hollow cylinder having closed truncated conical ends, theaxis of said drum lwing'inclined to the axis of rotation, an inlet spoutand an outlet spout'connected to opposite ends of said drum, the saidspouts being in theaxis of rotation, and shears within said drumarranged'partly in parallel relation and partly at divergent angles toeach other.

6. In a concrete mixer, a tilting frame of gravity, a'rcvoluble mixingdrum comprising a hollow-cylinder having closed t'run cated conical'endsthe axis of said drum being inclined to the-axis of rotation, an inletspout and an outlet spout connected to said drum in the axis ofrotation,hearings on said tilting frame ,rotatably supporting said spouts, meansfor detachably holding said tilting frame in operative position, a gearturning said gear ring to cause the rotation of the drum.

7. In a concrete mixer, the combination of a revolublc mixin drum havingits axis of figure inclined to its axis of rotation, 'an inlet spout andan outlet-spoutconnected rotation, a tilting frame having bearings forthe ends of said spouts, trunnions on said tilting frame outside thecenter of gravity of said tilting. frame and mixing drum, a frameprovided with bearings for said' trunnions, and means mounted on saidlatter frame for detachably holding said drum with its axis of rotationin a horizontal line.

Signed at lVaterloo, Iowa, this 26th day CHARLES L. BALDWIN. W tnesscsG. G. KENNEDY, M. E. KENNEDY.

provided with trunnions outside its center ring surr'ounding said drum,and means for to opposite ends of said drum in the axis of hollowcylinder having closed truncated eon-

